Phase transformation and grain growth behavior of a nanocrystalline 18/8 stainless steel

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dc.contributor.authorKotan, Hasan
dc.contributor.authorDarling, Kris A.
dc.date.accessioned2024-02-23T14:13:18Z
dc.date.available2024-02-23T14:13:18Z
dc.date.issued2017
dc.departmentNEÜen_US
dc.description.abstractFe-18Cr-8Ni and Fe-18Cr-8Ni-1Y (at%) stainless steel powders were nanostructured by mechanical alloying from elemental powders and subjected to 90 min annealing treatments at various temperatures. The microstructural evolutions as a function of alloy compositions and temperatures were investigated by in-situ and ex-situ x-ray diffraction experiments, transmission electron microscopy and focused ion beam microscopy. The dependence of hardness on the microstructure was utilized to study the mechanical changes. It was found that the resulting microstructures by mechanical alloying were bcc solid solution, the so-called alpha'-martensite structure. The high temperature in-situ x-ray diffraction experiments showed that the martensite-to-austenite reverse phase transformation was completed above 800 and 900 degrees C for Fe-18Cr-8Ni and Fe-18Cr-8Ni-1Y steels, respectively. A partial or complete retransformation to martensite was observed upon cooling to room temperature. Annealing of nanocrystalline Fe-18Cr-8Ni steel yielded grain growth reaching to micron sizes at 1100 degrees C while addition of 1 at% yttrium stabilized the microstructure around 160 nm grain size and 6 GPa hardness after 90 min annealing at 1200 degrees C.en_US
dc.description.sponsorshipTUBITAK [3501 - 114M214]en_US
dc.description.sponsorshipThe financial support from TUBITAK through the project 3501 - 114M214 is gratefully acknowledged.en_US
dc.identifier.doi10.1016/j.msea.2017.01.031
dc.identifier.endpage175en_US
dc.identifier.issn0921-5093
dc.identifier.issn1873-4936
dc.identifier.scopus2-s2.0-85010206559en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage168en_US
dc.identifier.urihttps://doi.org/10.1016/j.msea.2017.01.031
dc.identifier.urihttps://hdl.handle.net/20.500.12452/12373
dc.identifier.volume686en_US
dc.identifier.wosWOS:000394073300020en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherElsevier Science Saen_US
dc.relation.ispartofMaterials Science And Engineering A-Structural Materials Properties Microstructure And Processingen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectStainless Steelsen_US
dc.subjectMartensitic Transformationen_US
dc.subjectGrain Growthen_US
dc.subjectPhase Transformationen_US
dc.subjectHigh Temperature X-Ray Diffractionen_US
dc.subjectMetastable Austeniteen_US
dc.titlePhase transformation and grain growth behavior of a nanocrystalline 18/8 stainless steelen_US
dc.typeArticleen_US

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